1. Assess the Damage:
* Minor Damage (slightly rounded): If the plug is just slightly rounded, you might be able to get a good grip with new pliers, a socket with a good grip, or a drain plug wrench (specifically designed for this). Try applying penetrating oil (like PB Blaster) a few hours before attempting to remove it. Use slow, steady pressure; avoid excessive force to prevent further damage.
* Moderate Damage (significantly rounded or stripped): If the plug is significantly rounded or stripped, you'll need more aggressive techniques. Options include:
* Oil Pan Drain Plug Extractor: These tools are specifically designed to grip and remove stripped drain plugs. They're available at most auto parts stores. Follow the instructions provided with the extractor carefully.
* Socket with a Rubber Insert: A slightly oversized socket with a rubber insert (like a rubber band or piece of thick rubber) can sometimes provide enough grip to remove the plug.
* Drilling and Helicoil: This is a more involved repair. You carefully drill a pilot hole in the center of the plug, then use a helicoil kit to install a threaded insert into the oil pan. This allows you to screw in a new drain plug. This requires precision and the right tools; if you're not comfortable with this, it's best to take it to a mechanic.
* Severe Damage (plug broken off): If the plug is broken off completely, you'll likely need to drill it out. This is more challenging and requires precise drilling to avoid damaging the oil pan. Again, if you're not comfortable, take it to a mechanic.
2. If successful in removing the old plug:
* Clean the oil pan threads: Use a tap and die set (matching the drain plug's thread size) or a thread chaser to clean the threads in the oil pan. Be careful not to damage the oil pan.
* Install the new drain plug: Apply a new crush washer (it's crucial!) and tighten the new drain plug to the manufacturer's specifications. Over-tightening can damage the threads, so use a torque wrench if possible. The Sebring's service manual will specify the correct torque.
3. If you drill and helicoil:
* Follow the helicoil kit instructions precisely. This involves carefully drilling the broken plug out, then using the helicoil tool to install the new threaded insert.
Important Considerations:
* Safety First: Always work in a well-ventilated area. Use proper safety equipment, including gloves and eye protection. Hot oil can cause serious burns.
* Professional Help: If you're uncomfortable performing any of these repairs, it's best to take your vehicle to a qualified mechanic. Improper repair can lead to significant damage, including oil leaks.
* Torque Wrench: Using a torque wrench is highly recommended to avoid damaging the oil pan threads.
* Correct Drain Plug: Ensure you get the correct replacement drain plug. The parts store should be able to help you find the correct one using your vehicle's year, make, and model.
This is a general guide. Always refer to your vehicle's repair manual for specific instructions and torque specifications. Improper repair could lead to serious engine damage.